How can I find my iPhone if I don’t know my iCloud password?
How can I find my Apple device if I don’t know my ICloud password ?
[Re-Titled by Moderator]
iPhone 12, iOS 15
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You don't, sorry.
In order to perform the steps provided in the support article that lead you here, you'll be asked for your Apple ID and related password.
See also this article about that:--> If you forgot your Apple ID password - Apple Support
Regards and best of luck.
Giulio